A chemist determined by measurements that 0.050 moles of tin participated in a chemical reaction. Calculate the mass of tin that participated in the chemical reaction. Be sure your answer has the correct number of significant digits.

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?